New achievement elusive 4 , is compose of 4 boss.
Skratch - Watcher Tombs 1-4 / Kraken Mines 1- 3 / Dead City
First Mate Ripper - Grog Beach / Skull Cove
Amra-zu - Tower of Mardrom / Arcanum Castle
Agrex - Halls of Valheim / Crystal Caverns / Oltgar Keep
These bosses will spawn randomly! no need to kill all mobs or amount of mobs
- Any skeleton can respawn into Skratch (WT, KM, Dead City)
- Any shark can respawn into Ripper (Grog, Skull Cove)
- Any giant demon can respawn into Amra-zu (Arcanum Castle, Tower of Mardrom)
- Any giant ice elemental can respawn into Agrex (CC, Oltgar, Valheim)
Please see picture below.